Sometimes when i'm typing the keys will get stuck on a certain letter/ the delete button and the computer will keep typing the same letter/ keep deleting things. Why is it doing this? I've spilt soda on my keyboard a few years ago (like 2-3 years ago) but I was able to have my entire macbook refurbished by Apple cause i sent it off to be fixed (rather than take it into the store) so they should have fixed it.